chromium/components/feed/core/v2/surface_updater.h

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_FEED_CORE_V2_SURFACE_UPDATER_H_
#define COMPONENTS_FEED_CORE_V2_SURFACE_UPDATER_H_

#include <deque>
#include <map>
#include <string>
#include <vector>

#include "base/containers/flat_set.h"
#include "base/memory/raw_ptr.h"
#include "components/feed/core/proto/v2/ui.pb.h"
#include "components/feed/core/proto/v2/wire/reliability_logging_enums.pb.h"
#include "components/feed/core/v2/enums.h"
#include "components/feed/core/v2/launch_reliability_logger.h"
#include "components/feed/core/v2/stream_model.h"
#include "components/feed/core/v2/stream_surface_set.h"
#include "components/feed/core/v2/types.h"
#include "components/feed/core/v2/xsurface_datastore.h"

namespace feedui {
class StreamUpdate;
}  // namespace feedui
namespace feed {
class SurfaceRenderer;
class MetricsReporter;

// Keeps the UI up to date by calling |FeedStreamSurface::StreamUpdate()|.
// Updates are triggered when |StreamModel| changes, or when loading state
// changes (for spinners and zero-state).
class SurfaceUpdater : public StreamModel::Observer,
                       public StreamSurfaceSet::Observer,
                       public XsurfaceDatastoreDataReader::Observer { … };
}  // namespace feed

#endif  // COMPONENTS_FEED_CORE_V2_SURFACE_UPDATER_H_